JPEG XR libraries for C#

.NET has JPEG XR support only on Windows:

• WPF imaging: WmpBitmapDecoder and WmpBitmapEncoder in System.Windows.Media.Imaging read and write JPEG XR through the Windows Imaging Component codec. WPF is open source (MIT), the codec is part of Windows. Works in any .NET Windows app, not just WPF GUIs.

There’s no maintained cross-platform .NET JPEG XR library: ImageSharp, SkiaSharp and Magick.NET (which would need external jxrlib tools) don’t decode it. On Linux or macOS, call jxrlib through P/Invoke or run JxrDecApp.

• WPF imaging Read and write JPEG XR in C# on Windows with WPF's WmpBitmapDecoder and WmpBitmapEncoder. How to convert JXR to PNG, encode lossless and lossy JPEG XR.